The analogy of the Chimpanzee to the Orang, in its nest-building habit and in the mode of forming its nest, is exceedingly interesting; while, on the other hand, the activity of this ape, and its tendency to bite, are particulars in which it rather resembles the Gibbons. In extent of geographical range, again, the Chimpanzees--which are found from Sierra Leone to Congo--remind one of the Gibbons, rather than of either of the other man-like apes; and it seems not unlikely that, as is the case with the Gibbons, there may be several species spread over the geographical area of the genus. The same excellent observer, from whom I have borrowed the preceding account of the habits of the adult Chimpanzee, published fifteen years ago,* an account of the GORILLA, which has, in its most essential points, been confirmed by subsequent observers, and to which so very little has really been added, that in justice to Dr. Savage I give it almost in full. ([Footnote] *Notice of the external characters and habits of Troglodytes Gorilla. 'Boston Journal of Natural History', 1847.) "It should be borne in mind that my account is based upon the statements of the aborigines of that region (the Gaboon). In this connection, it may also be proper for me to remark, that having been a missionary resident for several years, studying, from habitual intercourse, the African mind and character, I felt myself prepared to discriminate and decide upon the probability of their statements. Besides, being familiar with the history and habits of its interesting congener ('Trog. niger', Geoff.), I was able to separate their accounts of the two animals, which, having the same locality and a similarity of habit, are confounded in the minds of the mass, especially as but few--such as traders to the interior and huntsmen--have ever seen the animal in question. (FIGURE 10.--The Gorilla (after Wolff).) "The tribe from which our knowledge of the animal is derived, and whose territory forms its habitat, is the 'Mpongwe', occupying both banks of the River Gaboon, from its mouth to some fifty or sixty miles upward.... "If the word 'Pongo' be of African origin, it is probably a corruption of the word 'Mpongwe', the name of the tribe on the banks of the Gaboon, and hence applied to the region they inhabit. Their local name for the Chimpanzee is 'Enche-eko', as near as it can be Anglicized, from which the common term 'Jocko' probably comes. The Mpongwe appellation for its new congener is 'Enge-ena', prolonging the sound of the first vowel, and slightly sounding the second. "The habitat of the 'Enge-ena' is the interior of lower Guinea, whilst that of the 'Enche-eko' is nearer the sea-board.